[Update] : At some point it switched back to the animation I'm used to but i have no idea why or how.

So... Until now i was used to see my character holding their saber with one hand but, at some point the animation changed and i don't know why. Now he's in the famous "Jedi 2-handed pose" which is nos as good looking. I was wondering, how does the animation system work, how did it change and is there a way to switch between animations ?